IBPS Clerk Prelims 7-Dec-2019 Paper

In the following question, one part of the sentence has an error. Read the sentence to find the error and mark the corresponding option. If the sentence has no error choose option 5 ‘No error’ as your answer.
Under the smart city umbrella, (1)/ Dubai has also been (2)/ investing heavy in (3)/ technology-based healthcare. (4)/ No error(5)